Delete search in menu bar

Hi everybody!

I'm customizing the top menù and I would like to delete the default search box, but this button is not like the others and I can't eliminate it by the administrator panel.

Does anyone know how can I do this?

I tried to erase the code in BxBaseMenu.php with bad results...

Hi, im trying to do the same on my site too, its so annoying, i wish someone came up with an answer for this:)